Microchip Technology MIC2876-5.0YMT-TR

Overview

MIC2876-5.0YMT-TR from Microchip Technology is a fixed-output, 5.0V synchronous boost regulator IC with bi-directional load disconnect, 2.5V–5.5V input range, 4.8A switch current capability, and 2 MHz switching frequency. It operates in pulse-skipping mode at light loads and supports automatic bypass mode when VIN ≥ VOUT - ideal for USB OTG host power delivery in portable devices.

For engineers reviewing the MIC2876-5.0YMT-TR datasheet, MIC2876-5.0YMT-TR pinout, MIC2876-5.0YMT-TR application, or MIC2876-5.0YMT-TR equivalent, key selection criteria include its 5.0V fixed output accuracy (±1.5%), <1 µA shutdown current, integrated anti-ringing switch for EMI reduction, 8-pin 2 mm × 2 mm UDFN package with exposed thermal pad, and bi-directional true load disconnect functionality.

Technical Context

The MIC2876-5.0YMT-TR implements a current-mode PWM control architecture with internal 2 MHz oscillator and slope compensation. Its power stage integrates a 4.8A NMOS main switch and PMOS synchronous rectifier, enabling bi-directional isolation via back-gate diode control during shutdown.

It features automatic mode transition between boost and bypass operation, soft-start with 1.1 ms ramp time, and open-drain /PG output referenced to 0.9×VOUT (rising) and 0.83×VOUT (falling). The device uses an internal reference of 0.9 V for regulation and includes overcurrent protection with cycle-by-cycle current limiting and thermal shutdown at 155°C.

Key Specifications

Pinout & Package

Package: 8-pin 2 mm × 2 mm UDFN with exposed thermal pad (EP), RoHS-compliant, moisture-sensitive level 1 (MSL1).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous boost regulator applications.

Compared with TPS61236PRTJR and MAX17222ETA+T, the MIC2876-5.0YMT-TR uniquely combines 4.8 A current capability, bi-directional load disconnect, integrated anti-ringing, and automatic bypass - making it the only option among the three qualified for USB OTG host and high-current portable power reserve designs.

Availability

MIC2876-5.0YMT-TR is available at Aetrix Electronics and suitable for USB OTG host power delivery, HDMI source supply, and portable power reserve applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MIC2876-5.0YMT-TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a global provider of microcontrollers, analog components, and power management ICs, serving automotive, industrial, consumer, and communications markets with high-reliability silicon solutions.

The MIC2876 product line delivers compact, high-efficiency synchronous boost regulators targeting portable electronics requiring bi-directional isolation, low quiescent current, and robust thermal performance in ultra-small packages.

FAQ

What is the output voltage tolerance of the MIC2876-5.0YMT-TR?

The MIC2876-5.0YMT-TR has a fixed 5.0 V output with ±1.5% accuracy over temperature and load, verified across –40°C to +125°C junction range. This specification applies under nominal conditions (VIN = 3.6 V, IOUT = 0 A) and ensures compatibility with USB 2.0/3.0 VBUS requirements without external trimming. The MIC2876-5.0YMT-TR achieves this via factory-trimmed internal reference and precision bandgap design.

Does the MIC2876-5.0YMT-TR support automatic bypass mode, and how does it work?

Yes, the MIC2876-5.0YMT-TR automatically enters bypass mode when VIN exceeds the regulated 5.0 V output. In this mode, the NMOS switch turns off and the PMOS synchronous rectifier fully conducts, creating a low-impedance path from IN to OUT with typical R_DS(ON) < 50 mΩ. This eliminates switching losses and improves efficiency above 5.0 V input - a feature confirmed in the functional block diagram and Figure 2-20 of the MIC2876-5.0YMT-TR datasheet.

What is the maximum continuous output current supported by the MIC2876-5.0YMT-TR?

The MIC2876-5.0YMT-TR supports up to 4.8 A peak switch current, but continuous output current depends on thermal design, input voltage, and efficiency. With proper PCB layout (≥6 thermal vias to AGND, 5000 mm² copper area), it delivers ≥2.5 A continuously at VIN = 3.6 V, VOUT = 5.0 V, and TA = 25°C. Derating is required above 85°C ambient per the thermal resistance (θJA = 90°C/W) and power dissipation equations in Section 7 of the MIC2876-5.0YMT-TR datasheet.

How does the bi-directional load disconnect function operate in the MIC2876-5.0YMT-TR?

The MIC2876-5.0YMT-TR uses an "always-on" maximum supply selector to control the PMOS back-gate diode, isolating IN from OUT in both directions when EN = 0 V. This prevents leakage even if VIN = 0.3 V and VOUT = 5.5 V - a capability validated in Section 5.2 and Table 1-1 (VOUT shutdown current = 2–5 µA). The MIC2876-5.0YMT-TR achieves true bidirectional blocking without external FETs or controllers.

What package type and footprint does the MIC2876-5.0YMT-TR use?

The MIC2876-5.0YMT-TR uses an 8-pin 2 mm × 2 mm UDFN package with exposed thermal pad (EP), compliant with JEDEC MO-229WAY. Pin pitch is 0.5 mm, and the land pattern requires solder mask defined pads with thermal vias under EP connected to AGND. This package is documented in DS20005572A-page 19 and supports reflow per J-STD-020 MSL1 guidelines - identical to the footprint used for the MIC2876-5.0YMT-TR in production designs.